Question about Dell OptiPlex SX270 PC Desktop

3 Answers

Dell sx270 optiplex

System went down on Sunday. Power supply was not the problem. Holding the power button in for 10 secs or replacing the flea battery did not help. I believe it is the motherboard. How do I remove/replace the motherboard? Are there a set of instructions somewhere?

Thanks;
Tom

mullantl@yahoo.com

Posted by on

  • 1 more comment 
  • mullantl Feb 23, 2008

    Thanks to all;



    I have taken all of your suggestions and comments and considered them carefully. Thanks so much for all your help.



    I was able to find the dell *.pdf file as noted via hyerlink w/ my tag # and removed the motherboard for a closer look. Pretty easy, I was a bit nerves about playing with the processor/heatsheild, but once I got a closer look I figured out that it just pops out revealing the 4 green screw on the board. I was able to determine the CN# as H1229.



    To answer the issue of why I think it is the board. I spoke with Dell support several times and went through their long methodology of testing the AC Power supply as well as purchasing an inexpensive new one of of ebay. The 5 capacitors marked 'X' are slightly domed on top. The ones marked 'K' and 'T' are flat. Nothing leaks or is swollen. For the most part the systems is the way I purchased it 5 years ago, but I did upgrade the RAM. There has been no other changes. Even with a new AC power supply, used in different outlets (of course), the systems will not post, which is to say that there is no 'amber' or 'green' light activity on the power button at all.



    I will air off the board and try to test it again as a last ditch effort before I consider a new board. Much of what I see is a direct replacement for H1229, but it is earmarked foe a GX270 system.



    I would like to consider a possible fix (replacing the capacitors) if it is not to expensive, in the Northern Va area. The future of this systems is to be used for a cocktail gaming table / spare emergency computer. I think this would be just fine.



    Thanks again for your suggestions;

    Tom

  • Anonymous Jun 11, 2008

    Where to get new capacitors



  • Troy Scott
    Troy Scott May 11, 2010

    How do you know it is dead? What exactly did it do?

×

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 474 Answers

Its easy on most dells, open the case, disconnect all the cables and remove anything in the way, then just unscrew the boards fastening screws that hold it down. Sometimes its a single screw that holds the board in place, once removed, the board slides out. First try reseating everything, Pull out the memory and put it back in, same for the video card and any other devices, unplug it also and pull out the bios battery for 30 seconds so everything resets.

If the Capacitors on the mother board are swollen or have discharge, then the board is what went bad, The capacitors are the round black cyclinders that stick up from the board, there supposed to have flat tops, like tiiny little soda cans, but when they get heat damage or go bad, the get domes and split at the top and eventually rupture.


Here is the link to the dell site for the repair manual.

http://www.support.dell.com/support/edocs/systems/opsx270/en/sm/index.htm

You can also go to ( www.support.dell.com )

In the middle it has a link to MANUALS, then it has a way for you to look it up by make and model of your PC.

Posted on Feb 23, 2008

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 37 Answers
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 117 Answers

Always start with the simplest solutions. Make sure the wall outlet isn't blown. Check to make sure you power bar isn't shut off.

If those aren't the problems, please give a more detailed description of what you were doing last, what you were downloading (inf anything). Sites you visited...any hardware changes...bios updates..cmos changes....

Posted on Feb 23, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

DELL OPTIPLEX GX 620 PC WONT SATRT ONLY ORANGE LIGHT KEEPS BLINKING


DELL OPTIPLEX GX 620 PC WILL NOT START.
ONLY ORANGE LIGHT.

Aug 31, 2010 | Dell OptiPlex GX620 PC Desktop

1 Answer

My dell sx270 optiplex doesnt powerup somtimes after i unplug power supply


Chances are it's going to be slightly oxidized contacts on a supply part, but it's not broken, just intermittent. Some power supplies use relays to supply the voltage, and their contacts can get oxidized. The fix for this is to take it off it's mounting, open it up, and use paper or a very fine emery cloth to clean the contacts. You can also change the relay, if that doesn't work out. It's not something that will hurt your computer, just a nuisance.

Apr 08, 2010 | Dell OptiPlex SX270 PC Desktop

1 Answer

My Dell OptiPlex 260 won't power on. There's power to the cable (LED comes on on the block) but no lights on the PC....any suggestions?


Do you hear a fan running? If not, it sounds like your power supply needs to be replaced.

If it's under warranty, Dell should be able to send one out right away. If not, you may have to purchas one through them.

Good luck on this. And let us know how you make out.

Cheers,

TIH

Dec 27, 2009 | Dell OptiPlex SX270 PC Desktop

1 Answer

Power switch dell optiplex sx 270


You problem is most likely caused by faulty capacitors on the motherboard. Most PCs of your age suffered from this. It was a manufacturing defect. Call Dell to see if they will replace it for free. This is a picture of two blown caps so you can id them on your MBmoz-screenshot.png
92b36e7.jpg

Aug 17, 2009 | Dell OptiPlex SX270 PC Desktop

1 Answer

I have a dell optiplex sx270 version PC.I had shut it down ,as we had a holiday the next day.I later tried to switch it on after my holiday .But it won't switch on .However the power adapter indicator...


it seems like the power button is at fault i doubt it will effect your data unless you pass it to a bad repair man who may erase everything your hard drive is a seperate entity and can be removed for backup

Aug 06, 2009 | Dell OptiPlex SX270 PC Desktop

1 Answer

DELL SX270 WILL NOT COME ON HAVE LITE INSIDE PC


the power supply is probably bad. It's really hard to tell without a little more information. When my power supply went bad on my computer. the hdd light would come on but nothing else and the computer would not even try to start.the power supply puts out several different voltages with both positive and negative outputs.

Aug 01, 2009 | Dell OptiPlex SX270 PC Desktop

1 Answer

I have a dell sx270 desktop when I plug it in only the fan works


First of all, keep the front button pressed until the system shuts off. It might be one of several causes:
1) Memory module damaged (or dirty)
2) The processor is damaged, or
3) The motherboard parted off.
Remove the memory modules and test them one by one. Or if you can test them in another PC (assuming both PCs use the same kind of modules).

May 01, 2009 | Dell OptiPlex SX270 PC Desktop

2 Answers

Dell Optiplex GX260 Tower flashing yellow power button


Hi

Power up the Optiplex GX260 and check the QUAD Pack Diagnostics LEDs (located at the back). Compare the LED pattern to http://support.dell.com/support/edocs/systems/opgx260/en/ug/solvprob.htm#1167139 for more info.

Ideally, to troubleshoot and resolve the issues, try removing all PCI devices, disconnect all external devices/peripherals including keyboard and mouse. You may leave the Monitor connected. Power up the PC and check for successful Power On Self Test (POST). If POST completes (generally fails on "Keyboard not present"), shutdown, connect keyboard and try POST again.

If all goes well, install PCI devices one at a time and test successful POST. This will help identity a failing device.
If issue persists, after removing all devices, remove the CMOS battery for about 90 seconds and try POST again. If same, remove all DIMMs (Memory) and check for beep codes. Compare beep pattern to http://support.dell.com/support/edocs/systems/opgx260/en/ug/solvprob.htm#1176760.
NB: Ensure to remove power lead and press power button briefly to use up flea power before working in the system.

If the system beeps, it suggests that the CPU and systemboard are "likely" fine. Install one DIMM at a time and test successful POST. If there no beeps then the systemboard and/or CU is/are at fault.

Regards
Mike

Mar 27, 2008 | Dell OptiPlex GX260 PC Desktop

Not finding what you are looking for?
Dell OptiPlex SX270 PC Desktop Logo

1,470 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dell PC Desktops Experts

joecoolvette
joecoolvette

Level 3 Expert

5660 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18299 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Are you a Dell PC Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...